vsoch commented on issue #7191: [AIRFLOW-4030] second attempt to add singularity to airflow URL: https://github.com/apache/airflow/pull/7191#issuecomment-579359117 I think the third approach is best: > If you need something pre-backed in the Docker image itself then I think we need a separate Dockerfile with FROM: singularity and some steps to build the dockerfile before docker-compose is run (and refer to the newly built image in Docker compose. My best bet if that is the case, that would be that you build and test such images locally for local testing and once it works I can help to integrate it in the CI scripts properly (You can try yourself - this will likely be just appropriate 'docker build' command executed only when --integration singularity is used) because Singularity requires a fairly specific set of custom dependencies, and then takes a while to compile. I can generate this file locally and use the already existing bases on quay.io. Could you give me some pointers about where to write the Dockerfile, what example from the current codebase (link) is what I should try to copy the logic for?
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